Sand slurry valve



April 2, 1946. R, g 2,397,675

' SAND SLURRY VALVE Filed Aug. 19, 1944 3 Sheets-Sheet 1 o'yL. I 3Y4? a 4W I ATTOENE Luce INVENT OR.

A r l 2, 1946. I R. L. LUCE 2,397,675

. SAND SLURRY VALVE Filed Aug. 19, 1944 3 Sheets-sheet 2 R0 LLace April 4 R. L. LUCE -2 ,397,675

SAND SLURRY VALVE I Filed Aug. 19, 1944 5 Sheets-Sheet'3 Roy LJL. use.

Erca- 11. .A7'7'0EN v I Patented Apr. 2, 1946 SAND SLURRY VALVE Roy L. Luce, Chicago, Ill., assignor to Hydro- Blast Corporation, Chicago, 111., a corporation of Illinois Application August 19, 1944, Serial No. 550,198

3 Claims. (Cl. 251-86) My invention relates to a sand slurry valve for the control of the flow of a mixture of sand and water delivered under pressure.

The walls of the orifice through which a mixture of sand and water flows under pressure are subject to rapid erosion, the rate of erosion being somewhat proportioned to the velocity of the material passing through the orifice.

It is the object of this invention to provide a valve by means of which different orifices can be included in the flow for controlling the amount of flow, but by means of which the amount of flow can also be controlled by the degree of opening of the valve.

The further object of my invention is to provide a valve in which one of the relatively movable elements is made of rubber which Works in pressure contact with a smooth metallic surface, thus eliminating the grinding eifect which usually obtains when two metallic parts move relative to one another in the presence of a slurry composed of sand and water.

A further object of my invention consists in pressing the parts of the valve together yieldingly, as by a spring, so that wear on the relatively moving surfaces will be compensated for by a movement of the valve members toward one another a distance corresponding to the wear.

In accordance with my invention, a flat revolvable disc is provided with a plurality of openings, at least some of which are provided with flow limiting plugs having openings therein of differing sizes, each limiting opening being much smaller than its associated opening through the valve disc so that the velocity of flow of slurry through the openings in the vlave disc will be slight compared with the velocity of flow through the limiting openings in the removable plugs.

My invention is illustrated in the accompanying drawings in which like parts are designated by like characters throughout the several views, and in which Fig. 1 is an elevation of the assembled valve in position for flow through an unrestricted orifice.

Fig. 2 is a bottom view of Fig. 1.

Fig. 3 is a bottom view of the valve, turned to position in which one of the restricted openings is in communication with the inlet conduit.

Fig. 4 is a section taken on the line 44 of Fig. 2.

Fig. 5 is a section taken on the line 5-5 of Fig. 3.

Fig. 6 is a. bottom view showing the rubber wear plate.

Fig. 7 is a section taken on the line 'l-l, of Fig.6.

Fig. 8 is a section taken on the line 88-of Fig. 6.

Fig. 9 is a faceview of the movable'valve disc with flow limiting plugs removed.

Fig. 10 is a section taken on the line |0l0 of Fig. 9, and 1 i Fig. 11 is a fragmentary section taken on the line |I|l of Fig. 9.

The valve of my invention is ordinarily attached to the bottom of avertical pipe such as l5 which is threaded into a casting 16, shown in section in Fig. 8. ,The lower face of thecasting I6 is preferably shaped as shown in Fig. 6

and provided with a soft rubber gasket 18, having an external contour corresponding with the exterior of the lower face of the casting 16. The rubber disc i8 is preferably cemented to the face of the casting I6 and further secured by screws such as I9 and 20. The casting I6 is provided with a downwardly extending stud 22 about which a collar 23 fits closely. The collar 23. abuts the lower face of the casting l6 and is of greater length than the thickness of the rubber gasket l8, the extending portion of the collar 23 serving as a bearing or guide about which a valve plate 25, Fig. 9, may be rotated, the valve plate having a flat surface which is held in contact with the rubber gasket l8 by means of a spring'2'l which is compressed by means of a washer 28 and by lock nuts 29 and 30 threaded onto the end of the stud 22. The disc of the casting I6 is provided with an opening 32 aligned with an opening 33 in the rubber gasket I8, and the valve disc 25 is provided with a plurality of openings 35, 36 and 31, each alignable with the openings through the gasket I8 and disc of casting Hi. When the valve disc 25 is in position, shown in Fig. 4, a comparatively unobstructed passage way is provided from the interior of the pipe l5. This position of the valve is used for clean out purposes, but preferably not for continuous flow of slurry. When the valve disc 25 is rotated to align either the opening 36 or the opening 31 with the openings 32 and 33 through the disc of casting l6 and the rubber gasket [8, the flow is restricted by means of plugs 40 or 4| as the case may be, which plugs are mounted in the discharge end of pipe elbows 42 and 43, threaded respectively into the openings 36 and 3'! in the valve disc 25. The valve disc 25 is preferably rotated by inserting a rod into one of the radially drilled holes 45, each of the holes 45 being provided i with a Communicating cross hole to preven clogging of the holes 45 with sand.

Since the velocity of flow of sand slurry through through the plugs 40 and H are gradually enlarged until the fiow becomes excessive, whereupon the worn plug is removed and a new plug inserted. If it is desired not to stop the flow of slurry because of a worn plug, the valve disc "25 may be rotated to a position in which the entrance to the pipe elbow from which flow 1 is occurring is restricted by the-partial displacement from alignment of the openings ssithrcugn the rubber gasket and the openings 36 or 32?, as the case may be, through the valve disc. 'Ihis I latter condition for flow control should be main- 1 tained for as short a time as convenient in order j to avoid excessive Wear at the point of restriction by reason of the high velocity of the slurry when the valve is partly closed.

Although the valve plate 25 as here illustrated 3 is provided with only three openings, two of which are restricted, it is to b'e undefsto'odthtrt a larger number of openings similar to 36 and 31 may "be,

1 provided, and if the number required to secure the 1 desired variation in flolw-i's greater than can be located within the size of the'disc illustrated, the

valve disc 25 may be enlarged to any desired degree by moving the stud 221a greater distance from the axes of the pipe l5 and'registering opening i'n the casting =16.

While l have shown and assented inven- V tion with respect to certain det'ails of construcfiill.

be unduly limited thereto, certain -modifications being possible Without departing from the spirit t is' to he understood that. Inc not wish to or scope ter my invention.- 7

Wh'at l olairn aind "desire to secure by Letters Patent is: r w

a va ve for sand -slurry, an entrance disc having an opening therein, a flat rubber gasket attahhed to'salid-di'sc anu -hav-in a, correspondin 1 opening through-it, spear-mg stud extending perp'endicularly from said entrance disc in a posi- 1 the plugs 40 and 4! is very high, the openings tion eccentric of the opening through the disc,

a valve plate pivoted upon said stud and having s-pe'ct'tb the entrance disc member having a slurry flow opening therein, a rubber gasket positioned between said members fixed with respect to one of said members and movable with respect to the other of saidmembers and having a slurry flow opening therein i'egisterable with the openings in said members, the opening in the flat valve plate member-"being provided with a fiowlimiting plug having an ripening therein {if less .si'ze'ftnan the openings through either of said members or through said rubber gasket whereby thevelocity of slurry new willfbelrestri'cted through the -open ings in said members'and said rubber gasket.

In a valve for sand slurry, :a firs't disc having a slurry llow ao'pen'ing therein, a second disc pivoted on the first idisc eccentrically 0f the opening therein and liaving' a plurality o f epenings any onerof w h may be registered With theopenin'g in the first dies by the rotation bf 'the "secoiid disc on its .piviot, a stud extending through said discs on the axis of their giver-3,1 cdnne'ctitin with "one another, a spring surrounding' said stutl, pressing said discs toward one another, and a rubber gasket compressed by said spring between-"said discs. provided with an opening tor slurry fiow thr ough registering o enings in said discs, and wear plugs 'fo r openingsi n 3 he second disc, "each havin arestricted npeni' e'i'eih sf less si'ze than cits associated cpening' threu' mes-eases disc or the opening through the seer-gasket or the operiing'th rou'gh the first disc. 

